This name is a synonym of Magnolia dodecapetala (Lam.) Govaerts.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 117690) with original publication details: Fl. Méd. Antilles 2: 140 1822.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:554761-1.
This name was in version 1 of The Plant List, record kew-117690, and has not been changed.